javascript 各种编码转换, md5编码

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var hexcase=0;var b64pad="";var chrsz=8;
function hex_md5(s){return binl2hex(core_md5(str2binl(s),s.length*chrsz))}
function b64_md5(s){return binl2b64(core_md5(str2binl(s),s.length*chrsz))}
function str_md5(s){return binl2str(core_md5(str2binl(s),s.length*chrsz))}
function hex_hmac_md5(key,data){return binl2hex(core_hmac_md5(key,data))}
function b64_hmac_md5(key,data){return binl2b64(core_hmac_md5(key,data))}
function str_hmac_md5(key,data){return binl2str(core_hmac_md5(key,data))}
function md5_vm_test(){return hex_md5("abc")=="900150983cd24fb0d6963f7d28e17f72"}
function core_md5(x,len){x[len>>5]|=0x80<<((len)%32);x[(((len+64)>>>9)<<4)+14]=len;var a=1732584193;var b=-271733879;var c=-1732584194;var d=271733878;for(var i=0;i16)bkey=core_md5(bkey,key.length*chrsz);var ipad=Array(16),opad=Array(16);for(var i=0;i<16;i++){ipad[i]=bkey[i]^0x36363636;opad[i]=bkey[i]^0x5C5C5C5C}var hash=core_md5(ipad.concat(str2binl(data)),512+data.length*chrsz);return core_md5(opad.concat(hash),512+128)}
function safe_add(x,y){var lsw=(x&0xFFFF)+(y&0xFFFF);var msw=(x>>16)+(y>>16)+(lsw>>16);return(msw<<16)|(lsw&0xFFFF)}
function bit_rol(num,cnt){return(num<>>(32-cnt))}
function str2binl(str){var bin=Array();var mask=(1<>5]|=(str.charCodeAt(i/chrsz)&mask)<<(i%32);return bin}
function binl2str(bin){var str="";var mask=(1<>5]>>>(i%32))&mask);return str}
function binl2hex(binarray){var hex_tab=hexcase?"0123456789ABCDEF":"0123456789abcdef";var str="";for(var i=0;i>2]>>((i%4)*8+4))&0xF)+hex_tab.charAt((binarray[i>>2]>>((i%4)*8))&0xF)}return str}
function binl2b64(binarray){var tab="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";var str="";for(var i=0;i>2]>>8*(i%4))&0xFF)<<16)|(((binarray[i+1>>2]>>8*((i+1)%4))&0xFF)<<8)|((binarray[i+2>>2]>>8*((i+2)%4))&0xFF);for(var j=0;j<4;j++){if(i*8+j*6>binarray.length*32)str+=b64pad;else str+=tab.charAt((triplet>>6*(3-j))&0x3F)}}return str}